SOME STRUCTURES EXPRESSING "CONTRAST/OPPOSITION"

- On the one hand  … but on the other hand…
- But / However / Yet / Nevertheless 
- S + V + COD + whereas / while + S + V ….
- Unlike [+ noun // or pronoun + noun ]
- Contrary to what + S + V  
- On the contrary, …
- As opposed to … 
- … different FROM what + S + V 

SOME STRUCTURES EXPRESSING "COMPARISON" 
- Compared  to... 
- By comparison with / in comparison with + noun [or pronoun + noun]   
- There is no comparison between X and X 
- to make/draw a comparison between X and X 
- It is the same AS … 
- It is similar TO (to what + S +V …) 
- Similarly, …

SOME STRUCTURES EXPRESSING "CONCESSION"
- Although / Though (S) …
- Despite the fact that (S) …
- Despite (his fear) / In spite of (his fear), … 
- However + adj + S + V = However powerful he is, he can’t help her. 
- Whatever + S + V = Whatever he does, I can’t … 
- Whoever/ Whenever/ Wherever he ...